By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
I read somewhere that during RMAN backups, RMAN reads the blocks for backup and skips the blocks which are being updated, and revisits at a later time to copy the blocks. Suppose I am trying to copy a huge database online, which is a 24/7 busy database with lot of updates. How is RMAN going to be a faster backup solution? Could you please explain how RMAN does internally while backing up the database?
What you read is not my experience with RMAN. As far as I know, RMAN does not skip blocks being updated. In fact, when a record is being updated, the database generally does not update the block on disk (which RMAN is reading) until some time after the commit. There are exceptions to this generalization though. RMAN will backup a block that is being changed. To ensure data consistency, RMAN uses the archived redo logs to recreate a consistent block.
Dig Deeper on Oracle database administration
Oracle expert Brian Peasland answers one reader's question about common pitfalls when connecting Oracle to outside programs.continue reading
One reader asks expert Brian Peasland a question about datafile sizes with the Oracle RMAN duplicate 10g command.continue reading
Managing parent table-child table relations in Oracle SQL environments is key to efficient programming.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.